package com.katsu.myapplib.secret;

import java.io.UnsupportedEncodingException;

public class k {

    private static char[] ec = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' };

    private static byte[] dc = new byte[] { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1 };

    public static String ee(byte[] data) {

        StringBuffer sb = new StringBuffer();

        int len = data.length, i = 0, b1, b2, b3;

        while (i < len) {

            b1 = data[i++] & 0xff;

            if (i == len) {

                sb.append(ec[b1 >>> 2]);

                sb.append(ec[(b1 & 0x3) << 4]);

                sb.append("==");

                break;

            }
            b2 = data[i++] & 0xff;

            if (i == len) {

                sb.append(ec[b1 >>> 2]);

                sb.append(ec[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);

                sb.append(ec[(b2 & 0x0f) << 2]);

                sb.append("=");

                break;

            }

            b3 = data[i++] & 0xff;

            sb.append(ec[b1 >>> 2]);

            sb.append(ec[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);

            sb.append(ec[((b2 & 0x0f) << 2) | ((b3 & 0xc0) >>> 6)]);

            sb.append(ec[b3 & 0x3f]);

        }

        return sb.toString();

    }

    public static byte[] de(String str) {

        try {

            return decodePrivate(str);

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

        }

        return new byte[] {};

    }

    private static byte[] decodePrivate(String str) throws UnsupportedEncodingException {

        StringBuffer sb = new StringBuffer();

        byte[] data = null;

        data = str.getBytes("US-ASCII");

        int len = data.length, i = 0, b1, b2, b3, b4;

        while (i < len) {

            do {

                b1 = dc[data[i++]];

            } while (i < len && b1 == -1);

            if (b1 == -1) break;

            do {

                b2 = dc[data[i++]];

            } while (i < len && b2 == -1);

            if (b2 == -1) break;

            sb.append((char) ((b1 << 2) | ((b2 & 0x30) >>> 4)));

            do {

                b3 = data[i++];

                if (b3 == 61) return sb.toString().getBytes("iso8859-1");

                b3 = dc[b3];

            } while (i < len && b3 == -1);

            if (b3 == -1) break;

            sb.append((char) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2)));

            do {

                b4 = data[i++];

                if (b4 == 61) return sb.toString().getBytes("iso8859-1");

                b4 = dc[b4];

            } while (i < len && b4 == -1);

            if (b4 == -1) break;

            sb.append((char) (((b3 & 0x03) << 6) | b4));

        }

        return sb.toString().getBytes("iso8859-1");

    }
}
